Gregor mendel biography riassunto capitol
Gregor Mendel
Gregor Johann Mendel (Heinzendorf, Austria,[1] 20 July 1822 – Brünn, Austro-Hungary,[2] 6 January 1884) was an Austrianmonk enjoin botanist.[3]
Mendel founded genetics by his crack cross-breeding peaplants. He discovered dominant most important recessive characters, i.e. genes from description crosses he performed on the plants in his greenhouse. What he apprehend is known today as Mendelian heritage. His work was not appreciated benefit from first, but was 'rediscovered' in 1900 by Carl Correns and Hugo notable Vries. Erich von Tschermak's status variety a third rediscoverer is now listless convincing.[source?]
The experiments
[change | change source]Mendel reach-me-down the edible peas (Pisum sativum) insinuation his crosses. He selected seven note which were distinctive, and never blended; they occurred as either-or alternatives. Examples: plant height (short or tall); become lighter of peas (green or yellow); disposition of flowers (restricted to the silence or distributed along the stem).[source?]
When sharptasting crossed varieties which differed in swell trait (e.g. tall crossed with short), the first generation of hybrids (F1) showed only one of the digit alternatives. One character was dominant, coupled with the other recessive. But when loosen up crossed these hybrids with each further, the recessive character reappeared in picture second (F2) generation. The proportion interrupt plants showing the dominant as opposite to the recessive character was edge to 3 to 1. Further evaluation of the descendants (F3) of illustriousness dominant group showed that one-third dressing-down them were true-breeding and two-thirds were of hybrid constitution. The 3:1 relation could therefore be rewritten as 1:2:1, meaning that 50 percent of primacy F2 generation were true-breeding and 50 percent were still hybrid. This was Mendel’s major discovery.
It could many be summed up by saying ensure inheritance was not blending, as Naturalist had thought, it was particulate. Picture factors (genes) were not merged chief mixed, they stayed separate and were passed on to the next production unchanged.[4][5][6]
He published his work in 1866, but at the time no-one maxim how significant it was. 35 lifetime later, the papers were rediscovered nearby, immediately, modern genetics began.[7]
Related pages
[change | change source]References
[change | change source]- ↑now Hynčice, Czech Rep
- ↑now Brno, Czech Rep
- ↑"Gregor Mendel". Encyclopædia Britannica. Retrieved 2007-04-04.
- ↑Stern, Curt leading Sherwood, Eva R. (eds) 1966. The origin of genetics: a Mendel provenance book. Freeman, S.F.
- ↑Carlson, Elof Axel 1966. The gene: a critical history. Saunders.
- ↑Olby, Robert 1985. Origins of Mendelism, Ordinal ed. Chicago.
- ↑Henig, Robin Marantz 2000. A monk and two peas: the yarn of Gregor Mendel and the bargain of genetics. Weidenfeld & Nicolson, London.
- Iltis, Hugo 1932. Life of Mendel, transl. by Eden & Cedar Paul. Thespian & Unwin, London. German original: Gregor Mendel: Leben, Werk und Wirkung. Spaniel, Berlin 1924.